Product Description Colour: Black Scope of application: bicycle Operating voltage: 4.5 (V) Volume: 113 (dB) Working current: 10 (mA) Type: Anti-lost device Packing list: 1 * remote control, 1 * anti-lost device Applicable: Suitable for bicycles, cars, motorcycles, electric bicycles, self-balancing scooters, doors and windows. Multi-purpose alarm: It is mainly used as an anti-theft alarm, and it also has the functions of one-key car search and SOS. Super Loud: Once triggered, the super loud alarm of 113 decibels is a great deterrent, which can effectively deter bicycle thieves. Waterproof: The waterproof level reaches IP55, which can be used outdoors. Adjustable Sensitivity: There are 7 sensitivity levels available, corresponding to 7 tones. "Do" is the highest and preset sensitivity level.